Liquid-cooled generating unit for high-frequency apparatus



Aug., 3 wz@ H. B. HARTMAN www@ LIQUID COOLED GENERATING UNIT FOR HIGH FREQUENCY APPARATUS AIR- \\ CT SPRING INNER TO PUMP FOR CIFP CULHTING' COOLING' FLUID CONNECTION TO GROUN SIDE OF' TRFINSFRMER HEY BUXTON HARTMAN, OF SCOTTDALE, PENNSYLVANIA, ASSIGNOR TO ELECTRC WATER STERIIIZER & OZONE COMPANY, OF SCOTTDALE, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA. l

LIQUID-COOLED GENERATING UNIT FOR HIGH-FREQUENCY APPARATUS.

Application ledctober 29, 1924. Serial No. 746,693.

rllhis invention relates to a novel ozonel generator particularly adapted for use in connection with high-frequency currents.

To that end the invention contemplates a generator construction embodying the use of a duid cooling medium, such for example as a non-conducting oil which is circulated by a pump or other means to maintain the eciency of the generator under all conditions of use. ln the generation of 'ozone by the .use of electrical currents of high-frequency and voltage for example, 1,000 to 10,000 cycles,'the amount of heat generated in a single tube is so` great that air cooling is not suicient, and therefore, fluid cooling means, preferably of the oil type must be utilized.

Accordingly, the present invention has primarily in view the provision of a simple, practical and reliable construction which may be easily manufactured from partsl which are susceptible of standardization thereby providing a construction that is economical to manufacture and easily assembled.

A further object of the invention is to provide a novel combined electrode and dielectric unit wherein the metallic electrode element is eii'ectively sea-led against oil seepage-between the metallic surface and the dielectric.

A still further object ofthe invention is to provide novel means for circulating the cooling fluid through and about both electrodes.

With theabove and other objects in view which will more readily appear as the nature of the invention'is better understood,

the samecons'ists in the novel construction, combinatlon and arrangement of parts hereinafter more fully described, illustrated and claimed.

According to the embodiment. of the invention shown in the accompanying drawings, the' same includes in its or anization a body designated generally as i and including an outer shell or jacket l and an inner tubular electrode 2, the same being held in spaced apart concentric relation b frictional or wedging fit respectively with the recessed flanged portions 3 and interior enlarged shoulder portions 4 of the carrier rings 5 thereby to provide al cooling fluid jacket or chamber. One of these rings is fitted to each end of the body A as will be clearly observed from Figure 1 and due to the spacing of the-members 1 and 2 by arranging theA same in the parts 3 and .'4, a

.Huid circulating chamber 6 is provided.

This chamber terminates in the enlarged end portions 7 which have the ports 8.

The electrode member 2 as well as the rings 5 are preferably of aluminum, and the said rings may be formed with the flanges 9 and the recessed portions 10 for receiving and engaging with the complemental annular boss portion 11 and the Harige 12 of the aluminum end caps or closure members 13. These end members are of duplicate construction and are preferabl recessed as at `14 and provided with the ateral ports 15, which act as either air or ozone ports according to the type of machine that the apparatus is operating in conjunction with. The end walls of the caps 13 are provided with openings for receiving cork packing rings 16 and the gland portions 17 of the hollow aluminum closure plugs 18 and 19. The plug 19 is provided at one end with an air vent opening 20 which may be closed by a suitable cap, while the plug 18 is provided with a packing gland 21 for holding a por celain insulator tube or sleeve 22. This insulator tube is provided with bushings 23 and 24 for supporting a conductor rod 25 for makingv contact with the inner electrode ofthe combined dielectric and electrode unit B. v

The said combined electrode unit and dielectric B preferably consists of a tubular dielectric member in the form of a glass tube 26 having the end portions 27 of re duced diameter, and having the enlarged interior portion vthereof covered with a metal coatingv 27a which constitutes the inner electrode for the device. rlthis coating 27a is preferably sprayed on the interior of the tube by a suitable metal spraying apparatus,

and extends throughout the surface of the enlarged portion of the electrode and also on the curved portions thereof between the body 26 and small ends 27. For the purpose of preventing oil from seeping in between the metallic coating 27 andthe inside face of the glass dielectric 26 it is necessary to seal the joint between the coating and the glass as indicated at 28, and not effected by heat, and at the Sametime adhering tenaciously to both the metal and glass. This is a very important factor in the operation of the device because it is essential that Huid be prevented from seeping in between the metallic coating and the glass to preventelectrical discharges occurring between'26 and 27a, as such electrical discharges would cause a cracking of the cooling` fluid used.

or the purpose of distributing the current efficiently to all portions of the metallic coating 27a, there is provided a spiral bronze spring 29 which connects as indicated at 30 with the central conductor rod 25. In using high frequencies it. is desirable that the current be uniformly distributed throughout the inner electrode, and the ar rangement described insures that result.

`The end caps 13 serve to center and hold the ends 27 of the glass dielectric preferably centered within the tubular alummum electrode 2, and the open ends of said electrode communicate with the hollow aluminum closure plugs 18 and 19. These plugs are respectively provided with ports 18 and 19L which communicate with the branches 31 and 3,1a of the piping which communicates with the main circulating pipes 3Q. As will be observed from Figure 1 the said main circulating pipes 32 are provided with branches 33 which communicate with the ports 8 of the rings 5. and therefore. the cooling oil or fluid divides at the` T or branch fitting at the end of the. pipe 32 and makes its way into the jacket 6 surrounding the outer electrode 2 and also into the hollow plugs and interior of the combined dielectric and electrode element B.

In use the conductor rod 25 is connected with one of the terminals of a high tension transformer, and then the casing including the electrode 2 is grounded to the ground side of the transformer, thus completing the electrical circuit, whose current manifests itself in the form of a brush discharge between the tubular outer electrode Q and the metallic coating 2T which constitutes the inner electrode of the apparatus. It will therefore be understood that ozone is generated asthe air passes through the relative ly constricted annular chamber forme-d b v the outer face of the glass dielectric 26 and the tubular aluminum electrode 2. In this particular type of application it is preferred to have the air enter at the upper port 15 and pass downwardly through the generator, the ozone passing out of the lower port 15.

The oil or other cooling fluid is preferably circulated from pipes 3:2 in a suitable cooling coil or radiator by means of a pump, thereby compelling the oil to move quickly enough to keep the heat down to the safety oint.

With the arrangement described it is pos sible to wash out the generator b v flushing water through the lower port 15. To do this proper piping connections are arranged so that disconnecting the air line is unnecessarv to thus flush the space between the electrode 2 and glass 26. After the water has been drained off, and the blower again g turned on. the small remaining quantity of water will be quickly evaporated.

From the foregoing it will be apparent that the present construction and arrangement provides a simple and practical generator construction which is capable of facile assemblv. and is easy to manufacture and maintain.

Without further description it is thought that other features and advantages will readily appear to those skilled in the art, and it will of coursebe understood that changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit of thc invention'or scope of the appended claims.

I claim 1. A liquid cooled ozone generator for high frequency apparatus comprising a tubular liacketed casing including the outer electrode, detachable closure members therefor, and a combined tubular dielectric and electrode unit insertible within said casing and supported by the closure members. and means for supplying a cooling fluid to the jacketed casing and said unit.

2. A tubular liquid cooled ozone genera tor. for high frequency apparatus comprising a body including a jacketed electrode` separable closure members at the ends of said body, a combined tubular dielectric and electrode unit supported in the said closure members, means for establishing electrical contact with the inner electrode, and a fluid cooling system respectively communicating with the jacketed body and the interior ofthe said unit.

3. A. tubular ozone generator comprising a Huid jacketed outer electrode member and a combined interior dielectric and electrode unit, and means for coursing a fluid cooling medium to said jacketed electrode member and through said combinedl dielectric and electrode member.

4. A tubular generator comprising a fluid jacketed outer electrode, closure members cooperating with the ends of said electrode to provide a relatively enclosed ozone genyrings having different erating chamber, a combined tubular dielectric and inner electrode unit mounted in said closure members, means for supplying a cooling fluid medium to said outer electrode and to said combined dielectric and inner electrode unit.

5. A tubular ozone generator includinga tubular shell andv electrode members, means for assembling said shell and electrode niembers in spaced relation to provide a viiuid circulating jacket, closure meansv cooperating with said first named means` to provide an ozone eneratingchamber, a combined tubular dielectric and electrode member having its ends supported in said closure mem-y bers, means for supplying electrical curf rent to the inner electrode, and means for coursing a cooling fluid through said combined tubular dielectric and electrode unit and saidjacket.

6. An ozone generator including a tubu, lar body comprising an 'outer shell and an inner tubular velectrode arranged in spaced relation to provide a circulating jacket, a tubular dielectric arranged within the tubular electrode, means for supporting said' tubular dielectric and cooperating with the tubular body to provide an ozone generating chamber, an electrode carried vby the 'inside face of the tubular dielectric member, means for establishing electrical contact with the inner electrode, and means for supplying Huid to theinterior of said dielectric and said jacket of the body.

A ozone generator comprising a body consisting of concentric tubular `members one of which vconstitutes the outer electrode and the space between which constitutes a .chamber for circulating a coolingmedium,

ring like members for holding said members in rspaced relation, recessed end caps cooperating with said ring like members to l, provide an ozone generating chamber, a tubular dielectric having reduced end portions carried `by said end caps, an inner electrode `member carried by the inside of the tubular dielectric, hollow plugs communicatin with the open ends of saidvdielectric mem er, a contact having an. outside terminal and ladapted toestablish electrical communicaf tion with the inner electrode through one end of the dielectric member, and means for supplying a cooling medium to the space between the shell and the outer electrode and vto the hollow plugs.

8. A tubular ozone generator including concentric shell and electrode members, internal diameters for interiitting andengaging with saidshell and electrode members thereby to maintain the same in spawced relation and to provide a Huid circulating jacket, dielectric supporting cap members detachably engaging with said rings, a tubular dielectric member supported in said caps and spaced from the inner electrode to provide an ozone generatingchamber, an inner electrode carriedby the inside face of the tubularl dielectric, means for establishing electrical Contact w'ith said inner electrode, and means for circulating a fluid cooling medium through said tubular dielectriccand said jacket.

9. A tubular vozone generator comprising a casing consisting of a tubular outer shell, rings iittedy to said outer shell and having interior shoulder portions, a tubular electrode fitted in said shoulder portions, ported closure members fitted to said rings and provided with openings, a combined tubular dielectric and inner electrode unit having its -ends' supported in said closure members, hol

.fitted in said shoulder portions, ported closure members fitted to said rings and provided with openings, a combined-tubular dielectric and inner electrode unit having its ends supported in said closure members, hollow plugs fitted to said end caps, a. cooling pipe system respectively communicating with said plugs and with said rings, and an electrical contact device carried by one of said plugs for establishing electrical contact with the inner electrode, said electrical contact device comprising a hollow insulator supported in the plug, a contact rod having an exterior' terminal and having the inner end thereof extending through one of the open ends of the tubular dielectric member, and a spiral conductor member connected with said contact and establishing communication with thev inner electrode throughout its length.

11. ln an ozone generator of the class described a combined dielectric and electrode unit, means for coursing a Vcoolin fiuid through said unit, and means for seahng the joint between the electrode and the dielectric thereby to prevent seepage of the cooling fluid between the electrode and the dielectric.

12. ln an ozone generator of the class decovering the ends of the inner metallic electrode and the glass adjacent thereto.

14. In an ozone generator a tubular glss dielectric of reduced diameter at itsends 5 and an inner metallic electrode consisting of metal sprayed on the inside of the body of the dielectric of large diameter, means for coursing ka non-conducting oil through said dielectric member, and a seal impervi ous to oil formed between the' ends of the 10 metallic electrode and the glass. In testimonywhereof I hereunto ax m'y' signature.

HARRY BUXTONA/HARTMAN. 

